Front surface portion of a motorcycle master cylinder cover



FIG. 1 is a front elevational view of a front surface portion of a motorcycle master cylinder cover showing our new design on a reduced scale, the motorcycle portions shown in broken lines are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a perspective view thereof; and,

FIG. 3 is a front elevational view thereof. 

We claim the ornamental design for a front surface portion of a motorcycle master cylinder cover, as shown and described. 